Synhimantus (Synhimantus) laticeps (Rudolphi, 1819) Railliet, Henry & Sisoff, 1912 (Nematoda, Acuariidae) parasitic in Tyto alba (Gmelin) (Aves, Tytonidae) in Argentina

JORGE A, ETCHEGOIN; FLORENCIA CREMONTE; NAVONE, GRACIELA T

ACTA PARASITOLOGICA

VERSITA

Año: 2000 vol. 45 p. 99 - 106

1230-2821

We provide a description of Synhimantus (Synhimantus) laticeps found in Tyto alba (Aves: Tytonidae) from Buenos Aires Province, Argentina. Comparison of measurements of present specimens with Cram and Smogorzhevskaya’s data, revealed several differences but cannot be considered enough to create a new species. This represents the first record of this species in South America and also contributes to the knowledge of the morphology of this species giving complete measurements and a detailed description of spicules. Moreover, we noted non anastomosing cordons and bicuspid deirids in fourth larval stage that agree with the evolutionary hypothesis that Synhimantus (Dispharynx) is previous to Synhimantus (Synhimantus).